Improvement in machines for making straw-boards



M SEIBERLING v Machines for Making Straw-Boards.

No. 212,155. Patented Feb. '11 1879;

.IDIII'YIIIII Even f0?" ",FETERS. FNOTD-LITHOGRAPHER WASHINGTON n CMONROE SEIBER-LING, OF AKRON, OHIO, ASSIGNOR TO AKRON STRAW BOARDCOMPANY, OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR MAKING STRAW-BOARDS..

Specification forming part of Letters Patent No. 212,155, dated February11, 187 9 application filed September 10, 1878.

To all whom it may concern:

Be it known that I, MONROE SEIBERLING, of Akron, in the county of Summitand State of Ohio, have invented an Improvement in Machines for MakingStraw-Boards and I do hereby declare the following to be a full andcorrect description of the same, reference being had to the accompanyingdrawings, in which- Figure l is a side view of a straw-board machinehaving my improvements. Fig. 2 is a top view of the same, the twoendless aprons being removed.

In straw-board machines having two endless aprons or felts for unitingtwo webs of pulp, if the aprons and pulps meet and run some distancetogether before reaching the pressing-rollers, air is entrapped orgathered in the wet pulp, and the paper is thus made streaked by theaction of the air.

The object of my invention is to remedy this difficulty.

My invention consists of the arrangement of two endless aprons and therollers of a strawboard or paper machine for uniting two webs of pulp,in such manner as to prevent the aprons and two webs of pulp frommeeting until they reach the pressing-rollers, and then bring the apronsto meet as they enter the pressing-rollers, which will thus drive backor expel all the air from the pulp, and leave the straw-board or paperwithout streaks; and, secondly, in mounting the coucher of the lowerapron on the same frame with the pressingrollers, so that the coucherand pressing-rollers will swing up and down at the same time on thishinged frame.

My improvements may be applied to machines of different generalconstruction. Therefore I need not give a full description, but willproceed to describe the features which I claim.

The box or frame A has at one end a standard, B, and near the middleanother standard, O.

The two endless aprons D and E may be arranged upon rollers, as shown inFig. 1, and set in motion by the crank-roller H, or any other suitablemeans.

The upper apron receives its web of pulp from the making-roller O, andis held down by the coucher P, and the lower apron receives its web ofpulp from the two making-rollers R and S, working in connection with thetwo couchers T and K. Now, the two aprons meet at the pressing-rollers Fand G, and are kept separate until they reach these rollers.

By this arrangement the two aprons or felts carryingwebs of pulp areprevented from meetin g, and thus entrapping or gathering air, which isliable to make the straw-board or paper streaked.

The two aprons being thus set apart, as they approach the pressingrollers no air can be entrapped or gathered in the webs of pulp carriedon these aprons. The two pressing-rollers F and G, coming thus suddenlyto press upon -both aprons and the two webs of pulp thereon, will driveback all the air, which has a free escape from the pulp. This willprevent any air from passing on in the pulp and giving streaks in thestraw-board, which streaks are very objectionable and not uncommon withsimilar machines constructed on the old plans.

The swinging frame or arms L carry the coucher or roller K, and the armsN are made part of this frame L, and carry the pressingrollers F and G.This frame (or the arms L) is pivoted to the frame A at pivots U, so asto swing up and down the coucher K and the pressing-rollers F G, thusmoving together or at the same time with the frame L and arms N. Twosprings, M, gently draw down the frame L.

By this arrangement the coucher can be raised without first raising thetop press-roller, which could not be done if the press-rolls weresupported separate from the coucher-frame.

By my improvements two webs of wet pulp may be brought together withoutany difficulty from gathering or entrapping air, thus preventing theliability of streaks in the strawboard or paper, as above described.

Having thus described my invention, I claim- The arrangement of thecylinder felt or apron E and the upper felt or apron, D, themaking-cylinders O, R, and S, and the two press-rollers 1 H, thecouchers P, K, and T, and the two small press-rollers F and G, so

that the surface of each felt or apron carrying The above specificationof said invention a web of pulp to form a sheet of straw-board signedand witnessed at Akron, Ohio, this 6th or thick paper will not cometogether until day of September, A. D. 1878. they reach thepress-rollers, for the purpose of preventing air from being entrapped 0rgathered between the two felts and thus making Vitnesses:

J. F. SEIBERLING, H. W. INGERSOLL.

MONROE SEIBERLING.

the paper water-streaked and uneven, as set forth.

